The objective of the present study was to investigate the transdermal permeation of cacalol (1) and a mixture of cacalone (2) and 6-epi-cacalone (3) in comparison with diclofenac acid (4) delivered from the same characterized nanoemulsion using Franz diffusion cells (formulae I, II and III). Results show that de Kp, J, Q24, P1 and P2 were higher for the acid diclofenac nanoemulsion than for the natural products nanoemulsions. As for the differences between the formulations I and II, with the natural products, Q24, the quantity extracted from skin and P2 were higher in the mixture of 2 and 3 nanoemulsion compared with the corresponding nanoemulsion of 1. In conclusion, the low permeability of the natural products nanoemulsions in comparison with that of diclofenac acid has the potential for development for drugs with local and systemic applications, respectively.
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